Anti-CD105/ENG Antibody

Rabbit IgG polyclonal antibody for Endoglin(ENG) detection. Tested with WB, IHC-P in Human.

SKU PA1395
Size 100μg/vial
Reactivity Human
Clonality Polyclonal
Host Rabbit
Ig Isotype N/A
Applications IHC, WB


Product Name Anti-CD105/ENG Antibody
See all ENG primary antibodies, ELISA kits and proteins
SKU/Catalog Number PA1395
Storage & Handling At -20°C for one year. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for a longer time.Avoid repeated freezing and thawing.
Size 100μg/vial
Description Polyclonal antibody for CD105/ENG detection. Host: Rabbit.Size: 100μg/vial. Tested applications: IHC-P. Reactive species: Human. CD105/ENG information: Molecular Weight: 70578 MW; Subcellular Localization: Membrane; Single-pass type I membrane protein; Tissue Specificity: Endoglin is restricted to endothelial cells in all tissues except bone marrow.
Cite This Product Anti-CD105/ENG Antibody (Boster Biological Technology, Pleasanton CA, USA, Catalog # PA1395)
Specificity Anti-CD105/ENG Antibody (PA1395) reacts with Human ENG, in native form and recombinant. Superfamily members of ENG are not reactive to PA1395.
Host Rabbit
Contents/Buffer Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3.
Form Lyophilized
Reconstitution Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Immunogen A synthetic peptide corresponding to a sequence at the N-terminus of human CD105(26-44aa ETVHCDLQPVGPERGEVTY).
Reactivity Human

Assay Details

Our Boster Quality Guarantee for Anti-CD105/ENG Antibody covers its use in the following applications.

*The recommended dilution ratios/concentrations are for reference only and optimal dilutions/concentrations should be determined by the end user.

Assay Dilutions Overview

Concentration: Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Immunohistochemistry(Paraffin-embedded Section), 0.5-1μg/ml, Human, By Heat
Western blot, 0.1-0.5μg/ml, Human

Boster's Compatible Products

The following reagents are used to generate the images below for Anti-CD105/ENG Antibody (PA1395).

Boster recommends Enhanced Chemiluminescent Kit with anti-Rabbit IgG (EK1002) for Western blot, and HRP Conjugated anti-Rabbit IgG Super Vision Assay Kit (SV0002-1) for IHC(P).

Images And Assay Conditions


Anti-CD105 antibody, PA1395, IHC(P)
IHC(P): Human Mammary Cancer Tissue


Figure 1. Western blot analysis of CD105 using anti-CD105 antibody (PA1395).
Electrophoresis was performed on a 5-20% SDS-PAGE gel at 70V (Stacking gel) / 90V (Resolving gel) for 2-3 hours. The sample well of each lane was loaded with 50ug of sample under reducing conditions.
Lane 1: human HepG2 whole cell lysates
After Electrophoresis, proteins were transferred to a Nitrocellulose membrane at 150mA for 50-90 minutes. Blocked the membrane with 5% Non-fat Milk/ TBS for 1.5 hour at RT. The membrane was incubated with rabbit anti-CD105 antigen affinity purified polyclonal antibody (Catalog # PA1395) at 0.5 μg/mL overnight at 4°C, then washed with TBS-0.1%Tween 3 times with 5 minutes each and probed with a goat anti-rabbit IgG-HRP secondary antibody at a dilution of 1:10000 for 1.5 hour at RT. The signal is developed using an Enhanced Chemiluminescent detection (ECL) kit (Catalog # EK1002) with Tanon 5200 system. A specific band was detected for CD105 at approximately 95KD. The expected band size for CD105 is at 71KD.

Target Info

Protein Target Info (Source:

Uniprot Id P17813
Gene Name ENG
Protein Name Endoglin
Tissue Specificity Endoglin is restricted to endothelial cells in all tissues except bone marrow.
Alternative Names Endoglin;CD105;ENG;END;
Subcellular Localization Membrane; Single-pass type I membrane protein.
Molecular Weight 70578 MW

*if product is indicated to react with multiple species, protein info is based on the human gene.


Protein Function Major glycoprotein of vascular endothelium. Involved in the regulation of angiogenesis. May play a critical role in the binding of endothelial cells to integrins and/or other RGD receptors. Acts as TGF-beta coreceptor and is involved in the TGF- beta/BMP signaling cascade. Required for GDF2/BMP9 signaling through SMAD1 in endothelial cells and modulates TGF-beta1 signaling through SMAD3. .
Research Areas Human

*You can search these to find other products in these research areas.
Background Endoglin(Osler-Rendu-Weber syndrome 1), CD105, is a type I membrane glycoprotein located on cell surfaces and is a part of the TGF beta receptor complex. Its gene is mapped to human chromosome 8. The protein consists of a homodimer of 180 kDA with disulfide links. It has been found on endothelial cells, activated macrophages, fibroblasts and smooth muscle cells. Endoglin has a role in the development of the cardiovascular system and in vascular remodeling and has been found to be elevated in pregnant women who subsequently develop preeclampsia.

Other Recommended Resources

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Publishing with Anti-CD105/ENG Antibody (PA1395)? Please let us know so we can cite the reference in this product datasheet. Email us at [email protected]

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Buy one primary antibody get one 0.5ml HRP or Biotin secondary antibody for free.
*Sample sizes are prepared on demand and will take extra lead time. (cannot be conjugated)



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Customer Q&As

  • Q: Do you offer BSA-free antibodies? Keyword: Bovine serum albumin, carrier protein, conjugation
    A: Yes, please contact us at [email protected] for more information about BSA-free antibodies and availability. The new BSA-free formula uses trehalose as a replacement to BSA. We have tested many alternative chemicals and found that trehalose protects the antibodies the best.
  • Q: Is your western blot protocol provided from the website applicable for all your antibodies? Keyword: applications, WB
    A: The protocol is applicable for all our antibodies in WB, the NC Membrane(0.45μm or 0.22μm) and transfer time(70 mins or 50 mins) depends on the protein molecular weight, details can be found in included protocol.
  • Q: Can I conjugate markers to this antibody? Can I link custom conjugates to this antibody? Keyword: conjugation
    A: The antibody is stored with BSA and cannot be conjugated with markers. Carrier free antibodies are available upon request. Please contact [email protected]
  • Q: What should I use for negative control?
    A: Please contact us for negative control suggestions. You can also check expression databases such as genecards, uniprot etc. Due to logistic reasons, we do not sell serum or lysates that we use internally for positive or negative control.
  • Q: Where can I find troubleshooting information? What should I do if I have unexpected bands, high background, no signal, weak signal
    A: You can find Boster's troubleshoot guides under tech support tab. Please contact us for further assistance on troubleshooting your experiment.
  • Q: What is the immunogen sequence of this antibody? Is this antibody polyclonal or monoclonal?
    A: You can find the immunogen sequence under "
  • Q: What is the expected band size? Why is it different than the observed band size?
    A: The expected band size is predicted on the size of the protein. The actual band size may be affected by a few other factors including but not limited to:<br>1. Post-translational modification:phosphorylation, methylation, glycosylation etc. These modifications prevent SDS molecules from binding to the target protein and thus make the band size appear larger than expected<br>2. Post-translational cleavage: this can cause smaller bands and or multiple bands <br><br>3. Alternative splicing: the same gene can have alternative splicing patterns generating different size proteins, all with reactivities to the antibody. <br><br>4. Amino Acid R chain charge: SDS binds to positive charges. The different size and charge of the Amino Acid side chains can affect the amount of SDS binding and thus affect the observed band size.<br>5. Multimers: Multimers are usually broken up in reducing conditions. However if the interactions between the multimers are strong, the band may appear higher., <br>
  • Q: What is the suggested dilution ratio for Western Blot (WB), Immunohistochemistry (IHC) and or ELISA standards? What is the optimal pH for the sample?
    A: Check the datasheet for the product for details on dilution ratios for different experiments. You can find the datasheet button on the right side of the product page.
  • Q: What is the protocol you used for your Western blotting (WB) and Immunohistochemistry (IHC)?
    A: Check our protocols under the tech support tab.
  • Q: What are some alternative names that could be used to describe this product?
    A: Some common names include but are not limited to cd105 antibody, endoglin antibody
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